1. Department of Pediatrics; Shiga University of Medical Science; Otsu Japan
2. Department of Developmental and Behavioral Pediatrics; Shiga University of Medical Science; Otsu Japan
3. Department of Neurosurgery; Nara Medical University; Kashihara Japan
4. Department of Pediatrics; Nara Medical University; Kashihara Japan
5. Department of Mental Retardation and Birth Defect Research; National Institute of Neuroscience, National Center of Neurology and Psychiatry; Kodaira Japan